package com.room.search.web.rest;

import com.google.code.kaptcha.Producer;
import com.room.search.constant.Constants;
import com.room.search.core.redis.RedisCache;
import com.room.search.response.RoomResult;
import com.room.search.util.sign.Base64;
import com.room.search.util.uuid.IdUtils;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.concurrent.TimeUnit;

/**
 * By   : ghd.bright
 * Time : 2022/4/2
 * Description: 获取验证码控制器
 */

@RestController
@RequestMapping("/api")
public class CaptchaResource {


    @Resource(name = "captchaProducerMath")
    private final Producer captchaProducerMath;

    private final RedisCache redisCache;

    public CaptchaResource(Producer captchaProducerMath, RedisCache redisCache) {
        this.captchaProducerMath = captchaProducerMath;
        this.redisCache = redisCache;
    }


    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    public RoomResult getCode(HttpServletResponse response) throws IOException
    {
        RoomResult ajax = RoomResult.success();

        // 保存验证码信息
        String uuid = IdUtils.simpleUUID();
        String verifyKey = Constants.CAPTCHA_CODE_KEY + uuid;

        String capStr;
        String code;
        BufferedImage image;

        // 生成验证码
        String capText = captchaProducerMath.createText();
        capStr = capText.substring(0, capText.lastIndexOf("@"));
        code = capText.substring(capText.lastIndexOf("@") + 1);
        image = captchaProducerMath.createImage(capStr);

        redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try
        {
            ImageIO.write(image, "jpg", os);
        }
        catch (IOException e)
        {
            return RoomResult.error(e.getMessage());
        }

        ajax.put("uuid", uuid);
        ajax.put("img", Base64.encode(os.toByteArray()));
        return ajax;
    }

}
